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      <a id="cell"></a>
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        <h2>
          <span class="refentrytitle">cell</span>
        </h2>
        <p>cell — 
      Cellular Automaton
    </p>
      </div>
      <div class="refsect1">
        <a id="idp93186352"></a>
        <h2>Description</h2>
        <p>
	 One-Dimensional Cellular Automaton. This opcode is the
         modified version of <span class="emphasis"><em>vcella</em></span> by Gabriel Maldonado.
    </p>
      </div>
      <div class="refsect1">
        <a id="idp93188032"></a>
        <h2>Syntax</h2>
        <pre class="synopsis"><span class="command"><strong>cell</strong></span> ktrig, kreinit, ioutFunc, initStateFunc, iRuleFunc, ielements</pre>
      </div>
      <div class="refsect1">
        <a id="idp93190016"></a>
        <h2>Initialization</h2>
        <p>
      <span class="emphasis"><em>ioutFunc</em></span> -- number of the table where the state of each cell is stored.
    </p>
        <p>
      <span class="emphasis"><em>initStateFunc</em></span> -- number of the table
      containing the inital states of cells. 
    </p>
        <p>
      <span class="emphasis"><em>iRuleFunc</em></span> -- number of a lookup table
      containing the 8-bit rule.
    </p>
        <p>
      <span class="emphasis"><em>ielements</em></span> -- total number of cells in a row. 
    </p>
      </div>
      <div class="refsect1">
        <a id="idp93194336"></a>
        <h2>Performance</h2>
        <p>
      <span class="emphasis"><em>ktri</em></span> -- trigger signal. Each time it is
      non-zero, a new generation of cells is evaluated. 
    </p>
        <p>
      <span class="emphasis"><em>kreinit</em></span> -- reset signal. Each time it is
      non-zero, state of all cells is forced to be that of
      initStateFunc.
    </p>
        <p>
      <span class="emphasis"><em>cell</em></span> models a classical 1D cellular
      automaton and stores the state of each cell in the table
      identified by <span class="emphasis"><em>ioutFunc</em></span>.
    </p>
        <p>
      <span class="emphasis"><em>initStateFunc</em></span> is an input vector containing
      the inital value of the row of cells, while
      <span class="emphasis"><em>iRuleFunc</em></span> is an input vector containing the
      chosen rule in the binary form (least significant bit first). 
    </p>
        <p>
      A new generation of cells is evaluated each time
      <span class="emphasis"><em>ktrig</em></span> contains a non-zero value.  Also the
      status of all cells can be forced to assume the status
      corresponding to the contents of
      <span class="emphasis"><em>initStateFunc</em></span> each time
      <span class="emphasis"><em>kreinit</em></span> contains a non-zero value.
    </p>
        <p>
      Note that each cell is supposed to be in one of two possible
      states (1 = "alive", 0 = "dead"), although fractional values
      should work too, because truncation is used. 
    </p>
      </div>
      <div class="refsect1">
        <a id="idp93202336"></a>
        <h2>Examples</h2>
        <p>
      Here is a simple example of the cell opcode. It uses the file
      <a class="ulink" href="examples/cell.csd" target="_top"><em class="citetitle">cell.csd</em></a>. 
      </p>
        <div class="example">
          <a id="idp93204208"></a>
          <p class="title">
            <strong>Example 104. A simple example of the cell opcode.</strong>
          </p>
          <div class="example-contents">
            <p>See the sections <a class="link" href="UsingRealTime.html" title="Real-Time Audio"><em class="citetitle">Real-time Audio</em></a> and <a class="link" href="CommandFlags.html" title="Csound command line"><em class="citetitle">Command Line Flags</em></a> for more information on using command line flags.</p>
            <pre class="programlisting">
<span class="csdtag">&lt;CsoundSynthesizer&gt;</span>
<span class="csdtag">&lt;CsOptions&gt;</span>
<span class="comment">; Select audio/midi flags here according to platform</span>
<span class="comment">;-odac           -iadc     ;;;RT audio I/O</span>
<span class="comment">; For Non-realtime ouput leave only the line below:</span>
<span class="comment">; -o cell.wav -W ;;; for file output any platform</span>
<span class="csdtag">&lt;/CsOptions&gt;</span>
<span class="csdtag">&lt;CsInstruments&gt;</span>
<span class="comment">; cell.csd by Gleb Rogozinsky</span>

<span class="ohdr">sr</span>        <span class="op">=</span> 44100
<span class="ohdr">kr</span>        <span class="op">=</span> 4410
<span class="ohdr">ksmps</span>     <span class="op">=</span> 10
<span class="ohdr">nchnls</span>    <span class="op">=</span> 1
<span class="ohdr">0dbfs</span>     <span class="op">=</span> 1

<span class="comment">; Cellular automaton-driven synthesis in spectral domain</span>
<span class="oblock">instr</span> 1

  iatt      <span class="op">=</span> p4                                <span class="comment">; envelope attack time</span>
  isus      <span class="op">=</span> p5                                <span class="comment">; envelope sustain time</span>
  irel      <span class="op">=</span> p6                                <span class="comment">; envelope release time</span>
  ivol      <span class="op">=</span> p7                                <span class="comment">; overall volume</span>
  
  <span class="comment">; create some white noise</span>
  asig      <span class="opc">rand</span>      0.8                      
  
  <span class="comment">; spectral analysis of asig</span>
  fsig      <span class="opc">pvsanal</span>   asig, 2048, 1024, 2048, 0  <span class="comment">; get a vector of magnitudes</span>
           
  <span class="comment">; calculate cellular automaton state</span>
  kfreq     <span class="opc">line</span>      50, 5, 1                  <span class="comment">; variable CA triggering frequency</span>
  ktrig     <span class="opc">metro</span>     kfreq                     <span class="comment">; trigger the CA to update cells</span>
            <span class="opc">cell</span>      ktrig, 0, 3, 1, 2, 2048   <span class="comment">; cells are written into ftable 3 </span>
                                                                        
                                                                         
  <span class="comment">; use current row of cells in spectral domain</span>
  fmas      <span class="opc">pvstencil</span> fsig, 0, 1, 3             <span class="comment">; apply spectral mask </span>
  aout      <span class="opc">pvsynth</span>   fmas                      <span class="comment">; reconstruct time signal </span>
  
  <span class="comment">; apply envelope and out signal</span>
  kenv      <span class="opc">expseg</span>    .001, iatt, 1, isus, 1, irel, .001
            <span class="opc">out</span>       aout<span class="op">*</span>kenv<span class="op">*</span>ivol
<span class="oblock">endin</span>

<span class="csdtag">&lt;/CsInstruments&gt;</span>
<span class="csdtag">&lt;CsScore&gt;</span>

<span class="comment">; This example uses one-dimensional cellular automaton</span>
<span class="comment">; to produce structures in spectral domain</span>

<span class="comment">; We have to prepare initial row of cells.</span>
<span class="comment">; One alive cell is enough to produce a simple fractal,</span>
<span class="comment">; so two alivee cells will make structure more sophisticated</span>
<span class="stamnt">f</span>1 0 2048 7 0 150 0 0 1 1 1 0 0 45 0 0 1 1 1 0 0

<span class="comment">; The CA rule is used as follows:</span>
<span class="comment">; the states (values) of each cell are summed with their neighboring cells.</span>
<span class="comment">; Each sum is used as an index to read a next state of cell</span>
<span class="comment">; from the rule table.</span>
<span class="comment">; Let us try rule # 129 (LSB binary 1 0 0 0 0 0 0 1).</span>
<span class="comment">; This rule will produce a fractal structure for single active cell</span>
<span class="comment">; For more rules see http://mathworld.wolfram.com/ElementaryCellularAutomaton.html</span>
<span class="stamnt">f</span>2 0 8 -2 1 0 0 0 0 0 0 1
<span class="comment">; Try some different rules i.E. 254 (0 1 1 1 1 1 1 1) or 169 (1 0 0 1 0 1 0 1)</span>

<span class="comment">; Prepare the output table of ielements size</span>
<span class="stamnt">f</span>3 0 2048 10 0

<span class="comment">; Time to make it sound!</span>
<span class="stamnt">i</span>1 0  13  0.3  7  3  1 
<span class="stamnt">e</span>

<span class="csdtag">&lt;/CsScore&gt;</span>
<span class="csdtag">&lt;/CsoundSynthesizer&gt;</span>
</pre>
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        <p><br class="example-break" />
    </p>
      </div>
      <div class="refsect1">
        <a id="idp93208496"></a>
        <h2>Credits</h2>
        <p>
      </p>
        <table border="0" summary="Simple list" class="simplelist">
          <tr>
            <td>Author: Gleb Rogozinsky</td>
          </tr>
          <tr>
            <td>October 2011</td>
          </tr>
        </table>
        <p>
    </p>
        <p>New in Csound version 5.16.6</p>
      </div>
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